Until battery tech catches up, the bulge is fact of life.
Stock battery is 1300 mAH
The extended seidio is 2800 mAH and sticks out like 0.9cm more, enough that it will NOT fit in most any case, stand, cradle etc etc.
Tough choice; carry another slim battery in your pocket or swap batteries every time you need to holster, cradle, stand your phone...